Escape from Tarkov error 521. Why is this happening? If Battlestate Games is your favorite multiplayer shooter, you've probably run into a bug and run into problems connecting to its servers.
Here's everything we know about Escape from Tarkov error 521, what it means and if there's a fix for it. From what we can tell, Escape from Tarkov with error 521 is due to issues affecting the game's servers. True, this prevents players from starting or continuing their sessions, which can be frustrating.
Unfortunately, there doesn't seem to be a bug or workaround for error 521 that players can try. More recently, the error popped up due to problems on the side of the server provider. If you encounter this, you will unfortunately have to wait. You can use this time in a variety of ways, including what Error 260 means and when Escape from Tarkov will launch on Steam.